remove 'order by' from the order 19 in the udf-window.sql

sql/core/src/test/resources/sql-tests/inputs/udf/udf-window.sql

@@ -94,7 +94,7 @@ ORDER BY cate, val;
 SELECT udf(val), cate, avg(null) OVER(PARTITION BY cate ORDER BY val) FROM testData ORDER BY cate, val;
 
 -- OrderBy not specified
-SELECT udf(val), cate, row_number() OVER(PARTITION BY cate ORDER BY val) FROM testData ORDER BY cate, udf(val);
+SELECT udf(val), cate, row_number() OVER(PARTITION BY cate) FROM testData ORDER BY cate, udf(val);
 
 -- Over clause is empty
 SELECT udf(val), cate, sum(val) OVER(), avg(val) OVER() FROM testData ORDER BY cate, val;

sql/core/src/test/resources/sql-tests/results/udf/udf-window.sql.out

@@ -323,19 +323,12 @@ NULL	a	NULL
 
 
 -- !query 19
-SELECT udf(val), cate, row_number() OVER(PARTITION BY cate ORDER BY val) FROM testData ORDER BY cate, udf(val)
+SELECT udf(val), cate, row_number() OVER(PARTITION BY cate) FROM testData ORDER BY cate, udf(val)
 -- !query 19 schema
-struct<CAST(udf(cast(val as string)) AS INT):int,cate:string,row_number() OVER (PARTITION BY cate ORDER BY val ASC NULLS FIRST ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW):int>
+struct<>
 -- !query 19 output
-NULL	NULL	1
-3	NULL	2
-NULL	a	1
-1	a	2
-1	a	3
-2	a	4
-1	b	1
-2	b	2
-3	b	3
+org.apache.spark.sql.AnalysisException
+Window function row_number() requires window to be ordered, please add ORDER BY clause. For example SELECT row_number()(value_expr) OVER (PARTITION BY window_partition ORDER BY window_ordering) from table;
 
 
 -- !query 20